Thermoformable sheet and thermoformed package

Abstract

A thermoformable sheet includes an exterior film, a printed pigment layer, an adhesive layer, an inner layer, and an interior sealing layer. The exterior film includes between 50% and 100% polyolefin-based polymers, by weight. The inner layer includes between 60% and 100% of high-density polyethylene polymer, by weight. The inner layer further includes a thickness between 100 microns and 350 microns. The printed pigment layer and the adhesive layer are located between the exterior film and the inner layer.

What is claimed: 
     
         1 . A thermoformable sheet comprising:
 an exterior film, the exterior film comprising between 50% and 100% polyolefin-based polymers, by weight;   a printed pigment layer;   an adhesive layer;   an inner layer comprising between 60% and 100% of high-density polyethylene polymer, by weight, the inner layer comprising a thickness between 100 microns and 350 microns; and   an interior sealing layer;   wherein the printed pigment layer and the adhesive layer are located between the exterior film and the inner layer, and   the inner layer is unoriented.   
     
     
         2 . The thermoformable sheet according to  claim 1 , wherein the exterior film is oriented. 
     
     
         3 . The thermoformable sheet according to  claim 1 , wherein the exterior film is unoriented. 
     
     
         4 . The thermoformable sheet according to  claim 1 , wherein the exterior film comprises between 50% and 100% polyethylene-based polymers, by weight. 
     
     
         5 . The thermoformable sheet according to  claim 1 , wherein the exterior film comprises between 50% and 100% polypropylene-based polymers, by weight. 
     
     
         6 . The thermoformable sheet according to  claim 1 , wherein the printed pigment layer is directly adjacent to the exterior film. 
     
     
         7 . The thermoformable sheet according to  claim 1  further comprising a thickness between 200 microns and 500 microns. 
     
     
         8 . The thermoformable sheet according to  claim 1 , wherein the inner layer further comprises between 2.5% and 30% of a hydrocarbon resin, by weight. 
     
     
         9 . The thermoformable sheet according to  claim 1 , wherein the interior sealing layer comprises polyethylene-based polymers. 
     
     
         10 . The thermoformable sheet according to  claim 1 , wherein the interior sealing layer comprises polypropylene-based polymers. 
     
     
         11 . The thermoformable sheet according to  claim 1 , further comprising an overall composition of polyolefin of between 80% and 100%, by weight. 
     
     
         12 . The thermoformable sheet according to  claim 1 , further comprising an overall composition of polyethylene of between 80% and 100%, by weight. 
     
     
         13 . The thermoformable sheet according to  claim 1 , further comprising a barrier layer comprising an ethylene vinyl alcohol copolymer. 
     
     
         14 . A thermoformable sheet comprising:
 an exterior film, the exterior film comprising an oriented polyethylene-based film comprising a thickness between 6 microns and 50 microns;   a printed pigment layer deposited directly on a surface of the exterior film;   an adhesive layer;   an inner layer comprising between 60% and 100% of high-density polyethylene polymer, by weight, the inner layer comprising a thickness between 100 microns and 350 microns; and   an interior sealing layer comprising a polyethylene polymer; and   wherein the printed pigment layer and the adhesive layer are located between the exterior film and the inner layer.   
     
     
         15 . A thermoformed package containing a product, the package comprising the thermoformable sheet according to  claim 14 , wherein the thermoformable sheet is thermoformed to create a product cavity. 
     
     
         16 . The thermoformed package containing a product according to  claim 15 , wherein the package consists of:
 the thermoformable sheet folded over on itself, and   a seal formed by bonding the interior sealing layer of the thermoformable sheet to itself.   
     
     
         17 . The thermoformed package containing a product according to  claim 15 , wherein the thermoformable sheet comprises a first thermoformable sheet and a second thermoformable sheet, and wherein the package consists of: the first and second thermoformable sheets, a seal bonding the interior sealing layer of the first thermoformable sheet to the interior sealing layer of the second thermoformable sheet, and the product cavity located between the first and second thermoformable sheets. 
     
     
         18 . A thermoformed package containing a product, the package comprising the thermoformable sheet according to  claim 1 , wherein the thermoformable sheet is thermoformed to create a product cavity. 
     
     
         19 . The thermoformed package containing a product according to  claim 18 , wherein the package consists of:
 the thermoformable sheet folded over on itself, and   a seal formed by bonding the interior sealing layer of the thermoformable sheet to itself.   
     
     
         20 . The thermoformed package containing a product according to  claim 18 , wherein the thermoformable sheet comprises a first thermoformable sheet and a second thermoformable sheet, and wherein the package consists of: the first and second thermoformable sheets, a seal bonding the interior sealing layer of the first thermoformable sheet to the interior sealing layer of the second thermoformable sheet, and the product cavity located between the first and second thermoformable sheets.